Directly using the mathematical formula, three numbers can be directly multiplied, that is, the square of 5.5 times 0.4π equals 0.88 cubic meter, 1 cubic meter = 1000 liter, then 1 cubic meter of water is 1000 liter. So 0.88 cubic meters, which is 880 liters of water.
So the well is 5.5 meters high and 0.8 meters wide, which is 880 liters of water.